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Use table lookup for run_quantize_{floor,ceil}().

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Reduce run quantization overhead by generating lookup tables during
bootstrapping, and using the tables for all subsequent run quantization.
This commit is contained in:
Jason Evans 2016-02-22 16:20:56 -08:00
parent 08551eee58
commit 0da8ce1e96
4 changed files with 90 additions and 32 deletions
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2
include/jemalloc/internal/arena.h
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@ -494,7 +494,7 @@ extern size_t map_bias; /* Number of arena chunk header pages. */
extern size_t map_misc_offset;
extern size_t arena_maxrun; /* Max run size for arenas. */
extern size_t large_maxclass; /* Max large size class. */
extern size_t small_maxrun; /* Max run size for small size classes. */
extern size_t run_quantize_max; /* Max run_quantize_*() input. */
extern unsigned nlclasses; /* Number of large size classes. */
extern unsigned nhclasses; /* Number of huge size classes. */

1
include/jemalloc/internal/private_symbols.txt
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@ -447,6 +447,7 @@ rtree_val_read
rtree_val_write
run_quantize_ceil
run_quantize_floor
run_quantize_max
s2u
s2u_compute
s2u_lookup